A train on a straight stretch of track starts from rest and accelerates at a steady 2 m/s/s. Determine its speed after 1 second, 2 seconds, and 5 seconds.
Question
A train on a straight stretch of track starts from rest and accelerates at a steady 2 m/s/s. Determine its speed after 1 second, 2 seconds, and 5 seconds.
Solution
Para resolver este problema, utilizaremos la fórmula de la velocidad en función del tiempo para un objeto que acelera de manera constante. La fórmula es:
donde:
- es la velocidad final,
- es la velocidad inicial,
- es la aceleración,
- es el tiempo.
Dado que el tren comienza desde el reposo, . La aceleración es de 2 m/s².
-
Después de 1 segundo:
-
Después de 2 segundos:
-
Después de 5 segundos:
Por lo tanto, la velocidad del tren después de 1 segundo es 2 m/s, después de 2 segundos es 4 m/s, y después de 5 segundos es 10 m/s.
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